1 /*
2 * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <sys/types.h>
18
19 #include <glob.h>
20 #include <unistd.h>
21
22 #include "compat.h"
23
24 void fatal(const char *, ...);
25 void fatalx(const char *, ...);
26
27 #ifdef HAVE_PROC_PID
28 int
getdtablecount(void)29 getdtablecount(void)
30 {
31 char path[PATH_MAX];
32 glob_t g;
33 int n = 0;
34
35 if (snprintf(path, sizeof path, "/proc/%ld/fd/*", (long)getpid()) < 0)
36 fatal("snprintf overflow");
37 if (glob(path, 0, NULL, &g) == 0)
38 n = g.gl_pathc;
39 globfree(&g);
40 return (n);
41 }
42 #else
43 int
getdtablecount(void)44 getdtablecount(void)
45 {
46 return (0);
47 }
48 #endif
49